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<h1 class="topictitle1">Configuring the DNS Service</h1>
<div id="body0000001219451936"><p id="nas_s_0099__p184331146490">After connecting the <span id="nas_s_0099__text103741358111512">OceanProtect</span> to the DNS server, external domain names can be resolved and accessed.</p>
<div class="section" id="nas_s_0099__section84408074710"><h4 class="sectiontitle">Prerequisites</h4><ul id="nas_s_0099__ul127106719472"><li id="nas_s_0099__li1591453144615">The DNS server has been configured and is running properly.</li><li id="nas_s_0099__li1171018715475">TCP/UDP port 53 between the <span id="nas_s_0099__text11398161191611">OceanProtect</span> and DNS server is enabled.</li></ul>
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<div class="section" id="nas_s_0099__section14363102215470"><h4 class="sectiontitle">Context</h4><ul id="nas_s_0099__ul11598536467"><li id="nas_s_0099__li1059953174610">A DNS server is used to resolve and access external domain names.</li><li id="nas_s_0099__li14591853134619">If you want to configure a standby DNS server, keep the domain names of the active and standby servers consistent.</li></ul>
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<div class="section" id="nas_s_0099__section177292329470"><h4 class="sectiontitle">Procedure</h4><ol id="nas_s_0099__ol69744384913"><li id="nas_s_0099__li75164286113"><span>Log in to DeviceManager.</span><p><ol type="a" id="nas_s_0099__nas_s_0014_ol55051543162413"><li id="nas_s_0099__nas_s_0014_li7505843162418">The following method applies to OceanProtect X series backup appliances:<ol class="substepthirdol" id="nas_s_0099__nas_s_0014_en-us_topic_0000001188062683_en-us_topic_0000001149078659_ol8463855369"><li id="nas_s_0099__nas_s_0014_li7787111161619">Choose <strong id="nas_s_0099__nas_s_0014_b10128199342">System</strong> &gt; <strong id="nas_s_0099__nas_s_0014_b41281913410">Infrastructure</strong> &gt; <strong id="nas_s_0099__nas_s_0014_b13121719143414">Cluster Management</strong>.</li><li id="nas_s_0099__nas_s_0014_li541671613166">On the <strong id="nas_s_0099__nas_s_0014_b383014414340">Backup Clusters</strong> tab page, click a node name under the <strong id="nas_s_0099__nas_s_0014_b18301641143415">Local Cluster Nodes</strong> area.</li><li id="nas_s_0099__nas_s_0014_li15142820111618">On the displayed <strong id="nas_s_0099__nas_s_0014_b15587849163415">Node Details</strong> page, click <strong id="nas_s_0099__nas_s_0014_b15587149123416">Open the device management platform</strong> to go to DeviceManager.</li></ol>
</li><li id="nas_s_0099__nas_s_0014_li5767154612411">For OceanProtect E1000, log in to DeviceManager by referring to <a href="nas_s_dm.html">Logging In to DeviceManager</a>.</li></ol>
</p></li><li id="nas_s_0099__li9544194974714"><span>Choose <strong id="nas_s_0099__b8664115914915">Settings</strong> &gt; <strong id="nas_s_0099__b1566525918493">Basic Information</strong> &gt; <strong id="nas_s_0099__b466565913491">DNS Service</strong>.</span></li><li id="nas_s_0099__li1154414984718"><span>Click <strong id="nas_s_0099__b1680451297104927">Modify</strong> in the upper right corner of the <strong id="nas_s_0099__b1421787493104927">Management DNS</strong> area to configure the DNS service for the management plane.</span></li><li id="nas_s_0099__li1197583174919"><span>Set <strong id="nas_s_0099__b252114027104927">Active DNS IP Address</strong>.</span><p><ol type="a" id="nas_s_0099__ol097514364916"><li id="nas_s_0099__li1260165320466">(Optional) Set <strong id="nas_s_0099__b1660165344615">Standby DNS IP Address 1</strong>.</li><li id="nas_s_0099__li897518364913">(Optional) Set <strong id="nas_s_0099__b159751632497">Standby DNS IP Address 2</strong>. Set <strong id="nas_s_0099__b1698817341104927">Standby DNS IP Address 1</strong> first and then <strong id="nas_s_0099__b1218119624104927">Standby DNS IP Address 2</strong>.</li><li id="nas_s_0099__li196055344615">(Optional) Test the connectivity between the DNS server and the storage system.<ul id="nas_s_0099__ul11601253144617"><li id="nas_s_0099__li860185312461">You can click <strong id="nas_s_0099__b444506045104927">Test</strong> next to a DNS IP address to test its availability.</li><li id="nas_s_0099__li760253124620">You can click <strong id="nas_s_0099__b98240482304">Test All</strong> to test the connectivity between the DNS server and storage system.</li></ul>
</li><li id="nas_s_0099__li1460253164610">Click <strong id="nas_s_0099__b161585913104927">Save</strong>.</li></ol>
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